INDEX 



[Italic page numbers indicate major references] 



A Page 



Acknowledgments 7,9,51,146 



Actinolitc-chlorite rocks 4S 



origin _ 44 



Alluvium, Quaternary 10,76 



Santa Clara formation 75 



Almaden area, Almaden shaft 148 



Almaden shaft, low-grade ore 171 



Almaden workings 149 



Almaden Canyon drainage area, stream gravel 



containing cinnabar nuggets 169 



Almaden fault 82,84,8* 



Alta >8, 88, 94, 97, 125, 147, 160, 173, 175 



chemical features 19 



ore bodies above US 



ore bodies above and below__ 11! 



ore bodies beneath US 



texture 19 



America mine, America shaft 150,189 



history ISO 



location and extent of workings 150 



Lower America workings 150 



possible extension of ore body 171 



Upper America tunnel 196 



Upper America workings 150 



Anticline near Mine Hill 86 



New Almaden mine area _ 130, 154 



Victoria area __ 1S9, 141 



Austin, H. F 169, 196 



B 



Barron, Probes, & Co 177, 179, 181, /*, 191 



Becker, O. F., cited 6,124 



Ben Trovata fault zone. 86,80,94 



Ben Trovato shear zone 10,79,82,84,87 



Bernal mine __ 95, 169 



production of quicksilver 58, 169 



Berrocal fault zone 84,85,90,92 



Bibliography, annotated, New Almaden mine. 196 



Franciscan group 11 



Blossom Hill 73,74,88,90,94,122 



Bottom tunnel. See Hacienda tunnel. 



Boulders weathered from blocky serpentine.- 49 



Bowen, N. L., cited 55, 56 



Bramlette, M. N., cited 29 



Breccia, graywacke and shale of Franciscan 



group 168 



silica-carbonate rock 1S4, 166, 167, 168, 171 



nontachylitic. !S 



megascopic features __ SS 



tachylitic._ _ S4 



megascopic features __ SS 



Browne, J. R., quoted.. 181 



Building stone 116 



Bulmore, Laurence E 8 



Buzztail area. See Harry area. 



Calero fault... 82,84,8* 



Calera limestone, of the Franciscan group 21 



in quarry of Permanente Cement Co SS, S4 



California, Board of Land Commissioners. _ . ISO, 181 



California Coast Ranges 54.55,57 



California quicksilver mines, yield of quick- 

 silver. 107 



California State Division of Mines.... 8 



Page 



Carbon dioxide, commercial source ... 188 



Castillero, Don Andreas, Mexican Army 



officer 177 



C.C.C. camp. 19S 



Cemetery Hill 20 



Central slope area 1S6, 144 



Buenos Ayres ore body 138, 173 



El Collegio ore body 138, 17S 



El Collegio stope 138 



Far West ore body 138. 17} 



Far West stope 97,115 



history.. 1S6 



Juan Vega tunnel 136,138 



La Ardilla ore body _ 138 



location and extent of workings 1S6 



Main tunnel..- 1S6, 137, 178, 179, 187 



Marysville ore body 138 



New Ardilla ore body 138, 17S 



New Ardilla stope. 137 



extension of ore body 17S 



North Ardilla ore body. 1S7, 138, 18t 



Pruyn ore body 138 



Sacramento ore body. _. 138, 17$ 



Santa Rita ore body 107, 1S7, 138, 139, 17S, 18S 



Santa Rita shaft 85, 110, If!, 194 



Santa Rita stope 97,136 



Santa Rosa ore body _ 17S 



Upper Pruyn stope 113 



Ventura ore body _ 138 



Century Mining Co. .- 163 



Chaboya, Luis 177 



Chaboya mine 177 



Chard, William.. 177 



Chemical analyses, alta SO 



Calera-type limestone H 



chert 28 



diabase 37 



graywacke 17 



greenstones 37 



oolitic limestone of Franciscan group 14 



rocks from New Almaden mine 6t 



serpentine rocks 64 



shale _ 18,28 



siltstone.-- 18, SO 



spilite _ - 37 



Chert of Franciscan group _._ __ 10, 16 



chemical features SS 



fossils *8 



megascopic features. S6 



microscopic features S7 



origin. _ 19 



China dump 194 



Chlorlte-lawsonlte rocks U 



Christy, S. B 190 



cited 97,98 



unpublished maps 128 



Church, J. A.. 190 



Church Hill 110,173 



Cinnabar nuggets 107,169,191 



Clark, B. L., cited _ 78 



Clark, W. O., cited _. 6 



Climate 6 



Coast Ranges of California 90, 124 



Conglomerate, Franciscan group 10,10 



Franciscan group, megascopic features SO 



Conglomerate Continued Page 



in Upper Cretaceous rocks 65 



pebble, late Tertiary age 166 



pebbles, Franciscan group SO 



Cora Blancaarea 97, 112, ISO, 173, 175 



Cora Blanca mine 183 



Cora Blanca ore body 17S 



Cora Blanca shaft 130,187 



Deep Gulch tunnel ISO, 193 



Grey shaft... 130, 1SI, 187 



history ISO 



location and extent of workings ISO 



Los Angeles opencut 132 



Los Angeles workings, chert 108 



Water tunnel Ill 



Cora Blanca workings 98, 108 



Cornish miners 183, 185 



Coyote Peak fault zone 90 



Cushman, J. A., cited 25 



Dacite, perlitic 74 



Davey, Hugh C 163,164 



Davis, E. F., cited 29,30 



Deep Qulch drainage area, stream gravel con- 

 taining cinnabar nuggets 170 



Derby, C.C . 156,189 



Derby, Thomas 189,191 



Diabase. ..I 35,36,37 



Diatomites - 75 



Dikes 57,73 



Discovery of New Almaden mine 176 



Drew, John 161,/SJ 



Dunite 50,51,58,60 



E 

 Earthflow 76 



El Senator prospect. See Senator mine. 



El Sombroso block .. 82, 84,87,91 



Electrolytic dust collector 169,193 



English camp _ /SS.194 



Enriquita fault _.. 82,87,8* 



Enriquita mine 116, ISt, 191 



Eldredge tunnel 1S4, 155, 171 



history lit 



submarginal quicksilver ore in dumps 171 



Eocene rocks 69 



folds... - 88 



Santa Teresa Hills... . 69 



Fahey, J. J., index determinations 100 



Fault blocks 46 



Faults.... 10, 13, 26, 47, 71, 79, 82, 84, 85, 90, 132, 147, 158 



dip-slip 93 



due to intrusion of serpentine 94 



Santa Clara formation.. 90 



strike-slip 91 



Fern Peak 26 



Fieldwork 7 



Folds - 10,26,71,79,82,85 



in post-Franciscan rocks 88 



in rocks of the Franciscan group 86 



folding after deposition 86 



formed during deposition 85 



203 



